/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.drools.workbench.services.verifier.api.client.index;

import java.util.Arrays;
import java.util.Collection;

import org.drools.workbench.services.verifier.api.client.maps.KeyTreeMap;
import org.drools.workbench.services.verifier.api.client.index.matchers.ExactMatcher;
import org.drools.workbench.services.verifier.api.client.index.matchers.Matcher;
import org.drools.workbench.services.verifier.api.client.index.select.Listen;
import org.drools.workbench.services.verifier.api.client.index.select.Select;

public class Conditions {

    public final KeyTreeMap<Condition> map = new KeyTreeMap<>( Condition.keyDefinitions() );

    public Conditions() {

    }

    public Conditions( final Collection<Condition> conditions ) {
        for ( final Condition condition : conditions ) {
            add( condition );
        }
    }

    public void add( final Condition condition ) {
        map.put( condition );
    }

    public Conditions( final Condition... conditions ) {
        this( Arrays.asList( conditions ) );
    }

    public Where<ConditionSelector, ConditionListen> where( final Matcher matcher ) {
        return new Where<ConditionSelector, ConditionListen>() {
            @Override
            public ConditionSelector select() {
                return new ConditionSelector( matcher );
            }

            @Override
            public ConditionListen listen() {
                return new ConditionListen( matcher );
            }
        };
    }

    public void merge( final Conditions conditions ) {
        map.merge( conditions.map );
    }

    public void remove( final Column column ) {
        final ExactMatcher matcher = Condition.columnUUID().is( column.getUuidKey() );
        for ( final Condition condition : where( matcher ).select().all() ) {
            condition.getUuidKey().retract();
        }
    }

    public class ConditionSelector
            extends Select<Condition> {

        public ConditionSelector( final Matcher matcher ) {
            super( map.get( matcher.getKeyDefinition() ),
                   matcher );
        }
    }

    public class ConditionListen
            extends Listen<Condition> {

        public ConditionListen( final Matcher matcher ) {
            super( map.get( matcher.getKeyDefinition() ),
                   matcher );
        }
    }
}